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Ultrathin WS2 Nanosheets Vertically Embedded in Hollow Mesoporous Carbon Framework - a Triple-Shelled Structure with Enhanced Lithium Storage and Electrocatalytic Properties

Abstract

Ultrathin WS2 nanosheets are vertically embedded in hollow mesoporous carbon spheres (HMCSs) to form a unique hierarchical triple-shelled (WS2-C-WS2) hollow nanospheres, i.e. HTSHNs WS2/C, via a facile and scalable hydrothermal method. The as-synthesized HTSHNs WS2/C nanocomposites are confirmed to have an expanded interlayer spacing of WS2 with chemical bonding between WS2 and HMCSs. The expanded WS2 interlayer spacing contributes to the enhancement of the kinetics of ion/electron transport and the improvement of electrochemical performance of the HTSHNs WS2/C. As a result, the optimized HTSHNs WS2/C composites deliver superior rate capability of 396 mA h g-1 at 10 A g-1, and stable cyclic performance up to 1000 cycles, presenting the capacity of 784 and 442 mA h g-1 at 1 and 5 A g-1, respectively. Additionally, HTSHNs WS2/C provides abundant catalytic active sites for the enhancement of electrocatalytic activity of the hydrogen evolution reaction (HER).

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Publication details

The article was received on 12 Jun 2018, accepted on 11 Aug 2018 and first published on 11 Aug 2018


Article type: Paper
DOI: 10.1039/C8TA05584J
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Ultrathin WS2 Nanosheets Vertically Embedded in Hollow Mesoporous Carbon Framework - a Triple-Shelled Structure with Enhanced Lithium Storage and Electrocatalytic Properties

    X. Zhang, R. Zhao, Q. Wu, W. Li, C. Shen, L. Ni, H. Yan, G. Diao and M. Chen, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA05584J

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